The version that you download automatically depends on the release version that you have selected. Most users will have the “normal” release version. The “pre-release” version is for those who are providing support or testing.
In PT9 the current “normal” version as of today 2020/1/3 should be 9.0.100.5 and this should be available on the server (with the holidays it has probably been slow going up). The “pre-release” version is 9.0.100.6 and is not available on the server.
You can change the version that you receive in PT9 by holding Shift while clicking on the main menu. Then go to Support and Development > Release Stage